ACR Stealer, an infostealer in circulation since 2024, is walking out of enterprise networks with saved browser passwords, live session tokens, PDFs, Microsoft 365 documents, and files from synced OneDrive and SharePoint folders. It gets in because someone pasted a command into a Run box and pressed Enter. Microsoft laid out two of the delivery chains on Thursday. Its Defender Experts team, the

Cybersecurity researchers have discovered a previously undocumented malware called GoSerpent that has been put to use in cyber attacks targeting entities in Southeast Asia since late 2025 with a focus on long-term access and intelligence gathering. Russian cybersecurity company Kaspersky, which uncovered the activity in February 2026, said it was aimed at government and diplomatic entities in

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a newly patched security flaw impacting Microsoft SharePoint Server to its Known Exploited Vulnerabilities (KEV) catalog, requiring Federal Civilian Executive Branch (FCEB) agencies to apply the fixes by July 19, 2026. The vulnerability in question is CVE-2026-58644 (CVSS score: 9.8), a critical deserialization

Owen Flowers, 18, and Thalha Jubair, 20, were each sentenced to five and a half years at Woolwich Crown Court on Thursday, 16 July 2026, for the 2024 hack of Transport for London. The attack left 148 TfL systems inoperable and forced all 27,000 of the transport authority's employees into an office to get their passwords reset in person. Both the NCA and the CPS put TfL's losses and recovery

A lot of this week’s trouble starts with something that looks close enough. A familiar repo. A useful installer. A harmless sync setting. Then the handoff goes bad, the box starts talking to someone else, and the damage moves faster than the explanation. Old bugs are back, weak defaults are earning their keep, and some attack paths are so plain they barely feel like research. Here’s the mess.